Hi:Is this correct gauge setting when everything is off? Note Manifold Pressure still registers 27.6 while everything else shows zero.http://forums.avsim.net/user_files/40187.jpgRegards,DonaldS

Are you on the moon? :) If not, I think manifold pressure will be the outside air pressure.

What was the barometric pressure?Here is a shot of mine with everything off... :-)http://mywebpages.comcast.net/geofa/pages/Geofdog2.jpghttp://forums.avsim.net/user_files/40190.jpg

Here's why simple explanation http://pao.cnmoc.navy.mil/pao/Educate/Weat...dexpressure.htmFarmer